The final section you need to be aware of is the Setting page. You can access it by click on the Settings link in your user panel.
If you allow users to sign up for an account, you will need to fill in this information. The "User Email Contact" is the "From:" address the users will see when they get their notice.
The "Subject Line" appears as the subject of the email.
Finally the Greeting" will form the body of the message. Make sure you identify who you are, why they are receiving this email, how to contact you, and a web address to get to the site.
The Contact Information is also used for the Forgot Password functionality.
Determines if you want users to have the ability to open an account. If set to None they will not be able to. All users can apply lets them sign up and immediately receive their confirmation email.
Finally, Only approved users can apply allows them to sign up but requires someone to approve their account via the Approval module. After approved, they will receive their confirmation.
Normally, you should just keep this set to Local Database. If you are using an alternate authentication method, type in the name of the file you are using to do so.